Washer women at home stopping behind after setback (4-3)
I believe the answer is:
twin-tub
'washer' is the definition.
(something used to wash)
'women at home stopping behind after setback' is the wordplay.
'women' becomes 'w' (standard abbreviation).
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'stopping' is an insertion indicator (stopping can mean blocking a gap).
'behind' becomes 'butt' (both can mean the buttocks).
'after setback' says the letters should be written backwards.
'butt' written backwards gives 'ttub'.
'w'+'in'='win'
'win' inserted into 'ttub' is 'TWIN-TUB'.
(Other definitions for twin-tub that I've seen before include "Dual washing-machine" , "Type of washing machine" , "Washing machine with two revolving drums" .)